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Re: test for transients

Hi,

A little more time now to respond...

> It is my firm belief that signal distortions down to -90 dB are
> relevant to what we hear when listening to a home playback event.

As bad as the 7th, 11th, 13th are, the further down the better.

> The only problem with this is that the perfect square wave will not
> be bandlimited, while the amp one will. Perhaps you can use the
> perfect square wave with the proper linear bandlimiting applied to
> it BEFORE you use it to subtract out from the simulated amp output

Yes, definite problems with the square wave generator...

Bandlimiting ends up generating slopes which end up generating even
harmonics...
...also seeing leakage from the FFT all over the place on just the
ideal square wave. Translation: Resembles IM galore on just the ideal
square wave not even connected to a circuit. Fix is to make-up a
series of 13 sine wave generators with each equal in amplitude to
their respective ideal harmonic. That will take care of the issues
above.

> ...at least as relevant as the HF transient response of an amp, and
> often is ignored or overlooked

Interesting


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